WW3JB2K20 Equivalent & Substitute Parts

Part Overview

The WW3JB2K20 is a 2.2 kOhms ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component is designed for applications requiring moisture-resistant performance across an extended operating temperature range of -55°C to 350°C. The part maintains Active product status with 1023 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

WW3JB2K20

Stackpole Electronics IncIn Stock: 1063WW3JB2K20 Datasheet

Current PartRFQ

45J2K2E

OhmiteIn Stock: 110245J2K2E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45J2K2E from Ohmite qualifies as a substitute based on the following critical parameters:

Resistance value matches at 2.2 kOhms with identical ±5% tolerance. Composition remains wirewound with axial package configuration, ensuring mechanical and electrical compatibility in through-hole applications. Temperature coefficient specification is identical at ±20ppm/°C. Both parts maintain ROHS3 compliance and share the same HTSUS classification (8533.21.0080).

The 45J2K2E operates at 5W power rating, which exceeds the 3W requirement of the WW3JB2K20. This higher power rating does not prevent substitution; it represents an uprated alternative suitable for applications where the original 3W specification is adequate. Physical dimensions differ due to the increased power rating, with the substitute measuring 0.343" diameter × 0.937" length compared to the original 0.187" diameter × 0.560" length.

Parameter Comparison

Engineering Selection Recommendations

Both the WW3JB2K20 and 45J2K2E maintain Active product status with current manufacturing support. Selection between these parts depends on application-specific requirements:

The WW3JB2K20 is appropriate for space-constrained designs where the smaller axial profile (0.187" diameter × 0.560" length) is required. The 45J2K2E provides a higher power margin at 5W, suitable for applications where thermal headroom or potential future uprating is beneficial. Both parts satisfy ROHS3 compliance requirements and carry equivalent regulatory classifications. Inventory availability is comparable for both options.

Frequently Asked Questions (FAQ)

Can the 45J2K2E replace the WW3JB2K20 in existing designs?

Yes, provided that physical space constraints do not prohibit the larger axial dimensions of the 45J2K2E (0.343" diameter × 0.937" length versus 0.187" diameter × 0.560" length). Electrical performance remains equivalent across all specified parameters.

What is the significance of the higher 5W power rating on the 45J2K2E?

The 5W rating on the 45J2K2E exceeds the 3W requirement of the WW3JB2K20. This represents an uprated component suitable for applications where the original 3W specification is adequate. The higher rating does not introduce incompatibility.

Are both parts suitable for the full -55°C to 350°C operating range?

The WW3JB2K20 specifies an operating range of -55°C to 350°C. The 45J2K2E does not provide an explicit operating temperature range in the available data. Verification of the 45J2K2E operating range is necessary for applications requiring the full -55°C to 350°C specification.

Do both parts meet the same regulatory requirements?

Yes. Both the WW3JB2K20 and 45J2K2E are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8533.21.0080).

What are the key differences between these axial wirewound resistors?

Primary differences are power rating (3W versus 5W), physical dimensions, and manufacturer series designation. Electrical specifications including resistance value, tolerance, temperature coefficient, and composition are identical.